Ice tunnel and river inside of the Matunuska Glacier, Alaska, USA

size: 758708
sha1: 5baba94bd6b8e172901a529eb1c240b23fd441bb
sha256: 1bf503e5fb287663fdc40224b44689ab52eccb80ba3028a6c261864dcaa9e0a7

size: 733684
sha1: 7b46763bd3b7f68ecac5b5693fbd757332f05d2d
sha256: b4f9e5eb403538a1119443d06b6aa26c144189de9aefef66f00f172548cc6d6c